On Thu, Jan 10, 2013 at 10:05:39AM +0800, Liu Bo wrote:
> On Tue, Jan 08, 2013 at 12:07:34PM -0800, Zach Brown wrote:
> > > This is for detecting extent map leak.
> > 
> > Hmm, I guess it's cool to get the allocation-specific decoding which you
> > don't get from the generic kernel leak tracking?
> 
> Thanks for the advice, but what allocation-specific decoding do you refer to?
> Could you please show me any examples?

IMHO that there's a leak check that is targeted to one exact problem in
one subsystem (extent_map in btrfs), does not need to be poked to do a
scan-for-leaks so the leak can be reported immediatelly and not after
some time. It makes sense for such a core structure like extent_map.
Other structures are allocated from a slab so we can at least check for
leaks upon module unload.

david
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